112 EQULO392: Ineroducing Equilibrium (22) Are your observation and explanation

Question

112 EQULO392: Ineroducing Equilibrium (22) Are your observation and explanation in (21) consistent with Le Châtelier's principle? Briefly explain. (23) What, if any, experimental evidence do you have that the equilibrium is affected by the addition of distilled H:07 Briefly explain. (24) Are your observation and explanation in (23) consistent with Le Châtelier's principle? Briefly explain. IV. Studying the Dissolution of NH&Cl; Equilibrium (25) What change do you observe when you add concentrated HCI (Step 18)? (26) What change do you observe when you heat the equilibrium mixture (Step 19)? 27) What change do you observe when solid NH4CI dissolves in water (Step 21)?

Explanation / Answer

NH4Cl dissolution:

Q25

if we add HCl, an adic, then

NH4+ + H+ = decreases solubility

Cl- ion --> decreases solubility due to common ion effect

therefore, overall solubility of NH4Cl decreases

Q26

NH4Cl dissolution is endothermic, so it reuqires heat in order to go into solution

additino of heat will increase solubility of NH4Cl

Q27

when NH4Cl dissolves in water:

- Temperature of solution decreases

- Solid disspaears

- Mass of solution remains constant

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